Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD1997CONTOUR LX, 2.5 L, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 14 (MODULE COMMUNICATIONS NETWORK)TESTINGTEST B: GENERIC ELECTRONIC MODULE (GEM) DOES NOT RESPOND TO NGS TESTER
1997 Ford Contour LX, 2.5 L, Standard
Test B: Generic Electronic Module (Gem) Does Not Respond To NGS Tester
1997 Ford Contour LX, 2.5 L, StandardSECTION Test B: Generic Electronic Module (Gem) Does Not Respond To NGS Tester
WARNING: This page is about a different car, the 1997 Ford Ranger and 1997 Ford Aerostar. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Before disconnecting or connecting any module, ensure ignition switch is in OFF position.
- Turn ignition off. Disconnect 26-pin GEM connector located behind center of instrument panel. Measure resistance of Light Blue/White wire between GEM connector and Data Link Connector (DLC). If resistance is less than 5 ohms, go to next step. If resistance is more than 5 ohms, repair open in Light Blue/White wire between GEM connector and DLC and retest system.
- Inspect 26-pin GEM connector for physical damage, bent terminals or corrosion. Repair or replace connector as necessary and retest system. If connector is okay, go to next step.
- Inspect DLC for physical damage, bent terminals or corrosion. Repair or replace connector as necessary and retest system. If connector is okay, check power and ground circuits to GEM. See GROUND DISTRIBUTION or POWER DISTRIBUTION article in WIRING DIAGRAMS. If fault is found, repair as necessary and retest system. If no fault is found, replace GEM and retest system.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.